A Portable radioactive plume monitor using a silicon photodiode

Tamakuma, Yuki*; Yamada, Ryohei ; Iwaoka, Kazuki*; Hosoda, Masahiro*; Kuroki, Tomohiro*; Mizuno, Hiroyuki*; Yamada, Koji*; Furukawa, Masahide*; Tokonami, Shinji*

In this study, a portable radioactive plume monitor using a silicon photodiode was developed for the detection of a radioactive plume (e.g. $^{131}$ I, $^{134}$ Cs and $^{137}$ Cs) in an emergency situation. It was found that the background count rate was proportional to ambient dose equivalent rate and the detection limit for the monitor at 20 Sv h $^{-1}$ as an ambient dose equivalent rate was evaluated to be 187 Bq m $^{-3}$ using the ISO11929 method. These results suggest that the detection limit for the system can be decreased effectively by lead shielding with optimized thickness.

Language	:	English
Journal	:	Perspectives in Science (Internet)
Volume	:	12
Number	:
Pages	:	p.100414_1 - 100414_4
Publication Year/Month	:	2019/09
Meeting title	:	27th International Conference on Nuclear Tracks and Radiation Measurements (ICNTRM 2017)
Held date	:	2017/08
Location (city)	:	Strasbourg
Location (country)	:	France
Patent information	:
PDF	:
Paper URL	:	https://doi.org/10.1016/j.pisc.2019.100414
DOI for research data	:
Keywords	:	放射性プルーム; 連続空気サンプリング; シリコンフォトダイオード; 検出限界
Research Facility	:
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Article of JAEA R&D Review	:
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Registration No. : BB20191944
JAEA Abstracts No. : 48000129
Paper Submission No. : 22480

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